strace is a useful diagnostic, instructional, and debugging tool. System administrators, diagnosticians, and troubleshooters will find it invaluable for solving problems with programs for which the source is not readily available.

Linux Test Project is a joint project started by SGI, OSDL, and Bull developed and maintained by IBM, Cisco, Fujitsu, SUSE, Red Hat, Oracle, and others. The project goal is to deliver tests that validate the reliability, robustness, and stability of Linux. Currently it contains more than 1000 syscall test cases, I/O and AIO stress test cases, a few Linux kernel device drivers, a well maintained fork of the Open POSIX Testsuite, a real-time test suite, and more.

Warewulf is an operating system management toolkit designed to facilitate large scale deployments of homogeneous and heterogeneous systems on physical, virtual and cloud based infrastructures. Originally, the Warewulf project pioneered the concept of stateless computing in HPC, setting the standard for large-scale cluster provisioning. It provided two functions, provisioning and monitoring but the two functions did not communicate within Warewulf itself, nor was it possible to hook other functions directly into Warewulf itself. Today, Warewulf is more than just a basic provisioning and monitoring solution as it now implements an abstract, object-oriented data store and a modular interface that facilitates a highly extensible, customizable feature set. Current and planned modules include monitoring (operating system, services, filesystems, etc.), provisioning, power management, user management, configuration management, event/trigger handling and notification, scheduler integration, cloud services (both local and remote), etc.

encsh is a simple tool that encrypts a shell or other interpreted script and puts a wrapper around it. The end result is an executable which, when given the correct password, will be decrypted and run through a pipe, effectively keeping the plain text of the script away from the disk.

With OGSS (Open Gmail SMS Shell), you can control your computer with SMS text messages. All you need is a cell phone and a Gmail account. OGSS uses Python and libgmail to fetch messages from your Gmail account and run the included commands on your computer.